Pantograph engraving-machine.



No. 655,750. Pvatented, Aug. I4, |900.

' M. BARR.

PANTOGRAPH ENGBAVINGVMACHINE.

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No. 655,750. Patentod Aug. I4, i900. M. BARR.

PANTGBAPH ENGBAVING MAGIIINE.

(Application filed Jan. 4, 1900.)

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STATES ATENT OFFICE;

MARK BAER, OE EEOADHEATH, ENGLAND, AssIeNOR To THE LINOTYPE COMPANY,LIMITED, OE LONDON, ENGLAND.

PANTOGRAPH ENGRAVING-MACHINE.

SPECIFICATION forming` part of Letters Patent No.. 655,750, dated August14, 1900. Application iiled January 4, 1900. Serial No. 343. (No model.)

To all whom, t may concern:

Be it known that I, MARK BARR, of The Linotype Vorks, Broadheath, in thecounty of Chester, England, have invented certain new and usefulImprovements in Pantograph Engraving-lvlachines; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The present invention relates to improvements in pantographengravingmachines, more especially to those capable of dealing withthree dimensions-length, width, and depth-by a swinging andvertically-moving tracer and tool.

r Referring to the accompanying drawings, which are to be taken as partof this specilication and read therewith, Figure 1 is a perspective viewof a machine made according to the present invention, but with ordinaryvertically-adjustable pattern and work tables. Fig. 2 is a perspectiveview of the pivotal block between the stem of the tool and thetelescopic lever. Fig. 3 is a perspective view of the pivotal blockbetween the tracer-rod on the one hand and the rocking bar andtracer-rod and tool on the other. Fig. et is a perspective View of amachine with swinging pattern and work tables made according to thepresent invention.

1 is the base of the machine, and 2 is a central standard.

3 is a horizontal rocking bar, supported in bearings 4 4, carried by thestandard 2 and In these bearings it is capable of a reciprocatingcircular motion about its longitudinal axis.

5 is the tracer-rod, and 6 the tracer-point.

7 is the tool, and 8 the tool-spindle.

The tracer-rod 5 is connected to the bar 3 by being led through a block9. This block is held to the bar; 3 by being pivoted to it within acavity 10 by pivots 1l, the axial line of which is at right angles withbut in the saine horizontal plane as the axis of the rocking bar 3. Thetool-spindle 8 is connected to the bar 3 in exactly the same way as thetracer-rod 5-@1 e., by being led through a block 9, held to the bar 3 bybeing pivoted to it Within a cavity 10a by pivots l1, the

axial line of which is at right angles with but in the same horizontalplane as the axis of the rocking bar 3, and therefore parallel with theaxial line of the pivots 11 above mentioned. The lateral motion of thetracerpoint 6 is conveyed to the tool 7 by means of a link 12, the endsof which are shown as forked, to the more conveniently connect with thepivots 13 and 13a of the blocks 9 and 9,

` respectively.

Referring to Fig. 1, 14 is the pattern-table, fast on a bracket l5,capable of vertical adl justment on a slide 16, fast to the base l andthe standard 2 by means of a traversing screw 17. 18 is the work-table,fast on a bracket 19, capable of vertical adjustment on a slide 20, fastto the standard 2 by means of a traversing screw 2l.

The construction of pattern and work table just` described does not formany part of the present invention.

The tool-spindle 8 is carried by and turns in a bearing 28 in the end ofa bracket 29, standing up from the top of the standard 2.

The vertical motion of the tracer-point 6 and tracer-rod 5 iscommunicated to the toolspindle 8 by a telescopic lever 22 23. Thislever is situated above the rocking bar 3. It

'has its fulcrum 26 in the said bar by being passed through a block 24,which is capable of being slid along the portion 22 of the lever `and ofbeing slid longitudinally along slots 25` 25 in the end of the bar 3,duly forked to receive the said block 24 and slots 25. The position ofthe fulcrum 26 is adjustable lengthwise of the rocking bar 3 by means ofthe locking-nut 27 on the trunnions, one on each side of the block 24,which engage in the respective slots 25. The fulcrum 26 above describedis always on the side of the tool-spindle S opposite to the tracer-rod5. The toolspindle 8 is pivotally connected to the portion 22 of thetelescopic lever 22 23 by being passed through the block 30, which hangsby pivots 3l down through a hole 32 in the said portion 22 and entersthe bore of the block 9a. The block 30 is connected to the toolspindle 8by any suitable means which will allow of the said spindle 8 turningfreely in it and of also holding the spindle 8 to the block 30, so thatthe up-anddown motion of IOO the latter will take the said spindle' upand down with it. The said means may include a capacity for adjustmentalong the length of the spindle.

37 is the tool-spindle driving-pulley.

The tracer-rod 5 is pivotally connected to the telescopic lever 22 23 inthe following way: The outer end of the portion 23 of the telescopiclever 22 23 has a fork 33. 34 is a sleeve vertically adjustable upon therod 5 by a set-screw 35 and carrying a trunnion 36 on each side of it,the two pivoting in the respective prongs of the fork 33. The axes ofthe pivots 36 and 31 are parallel with each other and with those 1l 11aof the blocks 99, already described.

The present invention includes means by which' the pattern-table may beset at any angle with the horizon about a fixed center and means bywhich that setting will effect the setting of the work-table at acorresponding anglo about a like center.

Referring to Fig. 4, 14 is the pattern-table. It is mounted centrallyupon a spindle 37, which is fast to it and which rocks by means of aball-and-socket joint 3S in a bracket 39, standing up from the base 1.The spindle 37 iits telescopically in a socket 40, standing upvertically from the end of a rod 4l, parallel with the axis of therocking bar 3 and capable of a to-and-fro sliding motion in guides 4242, which are fast on a bar 43, adapted to slide at right angles withthe length of the rod 4l upon V-guides 44 44, fast on the said base 1.The socket 40 is connected to the respective ends of the rod 41 by aball-and-socket joint 45. 46 is a spindle centrally fast to anddepending from the worktable 1Sa in the same way as the spindle 37 isfast to and depends from the pattern-table 14% lt rocks by means of aball-and-socket joint 47 in the bracket 48, projecting laterally fromthe standard 2. The spindle 4G fits telescopically in a socket 49, thebottom end of which is connected by a ball-and-socket joint 50 to therespective ends of the rod 4l in the same way as the socket 40 isconnected to the respective ends'of the said rod. 51 51 are set-screwsfor holding the bar 43 in its adjusted position upon the V-guides 44 44,and 52 5.2 are set-screws for holding the rod 41 in its adjustedposition in the guides 42 42.

1. The hereinbefore-described combination of rocking bar; tracer-rodcapable of moving vertically through the said bar and of swingingtherein on an axis at right angles with the axis thereof; tool-spindlecapable of moving vertically through the said bar and of swingingtherein on an axis at right angles with the axis thereof; a linkconnecting the tracer-rod and the tool-spindle; a telescopic leverhaving its fulcrum on the said rocking bar; a pivotal connection betweenthe toolspindle and one portion ofthe said lever and a pivotalconnection between the tracer-'rod and the other portion.

2. The hereinbefore-described combination with the pattern-table and thework-table of an engraving-machine, of a spindle centrally fast to eachtable and depending therefrom; a stationary ball-and-socket jointcarried by the frame of the machine under each table and through theball of which each spindle is respectively made fast; a socket in whichthe :respective spindles can telescope; a rod having the two socketsabove mentioned connected to its respective ends by ball-andsocketjoints; guides in which the said rod turns; and guides at right angleswith the said rod and upon which the said guides and rod can be moved.

3. The hereinbefore-described combination of rocking bar; tracer-rodcapable of moving vertically through the said bar and of swingingtherein on an axis at right angles with the axis thereof; tool-spindlecapable of moving vertically through the said bar and of swingingtherein on an axis at right angles with the axis thereof; a linkconnecting the tracer-rod and the tool-spindle; a telescopic leverhaving its fulcrum on the said rocking bar; a pivotal connection betweenthe tool'- spindle and one portion of the said lever; a pivotal connection between the tracer-rod and the other portion; pattern-table andspindle centrally fast thereto and depending therefrom; work-table andspindle centrally fast thereto and depending therefrom; stationaryball-and-socket joint carried by the frame of the machine under eachtable and through the ball of which each spindle is respectively IOO IIC

